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mesa/src/gallium/auxiliary/draw/draw_tess.c

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/**************************************************************************
*
* Copyright 2020 Red Hat.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**************************************************************************/
#include "draw_tess.h"
#ifdef DRAW_LLVM_AVAILABLE
#include "draw_llvm.h"
#endif
#include "tessellator/p_tessellator.h"
#include "nir/nir_to_tgsi_info.h"
#include "util/u_prim.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/ralloc.h"
static inline int
draw_tes_get_input_index(int semantic, int index,
const struct tgsi_shader_info *input_info)
{
int i;
const ubyte *input_semantic_names = input_info->output_semantic_name;
const ubyte *input_semantic_indices = input_info->output_semantic_index;
for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
if (input_semantic_names[i] == semantic &&
input_semantic_indices[i] == index)
return i;
}
return -1;
}
#ifdef DRAW_LLVM_AVAILABLE
#define DEBUG_INPUTS 0
static void
llvm_fetch_tcs_input(struct draw_tess_ctrl_shader *shader,
const struct draw_prim_info *input_prim_info,
unsigned prim_id,
unsigned num_vertices)
{
const float (*input_ptr)[4];
float (*input_data)[32][NUM_TCS_INPUTS][TGSI_NUM_CHANNELS] = &shader->tcs_input->data;
unsigned slot, i;
int vs_slot;
unsigned input_vertex_stride = shader->input_vertex_stride;
input_ptr = shader->input;
for (i = 0; i < num_vertices; i++) {
const float (*input)[4];
int vertex_idx = prim_id * num_vertices + i;
if (input_prim_info->linear == FALSE)
vertex_idx = input_prim_info->elts[vertex_idx];
#if DEBUG_INPUTS
debug_printf("%d) tcs vertex index = %d (prim idx = %d)\n",
i, prim_id, 0);
#endif
input = (const float (*)[4])((const char *)input_ptr + (vertex_idx * input_vertex_stride));
for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
vs_slot = draw_tes_get_input_index(
shader->info.input_semantic_name[slot],
shader->info.input_semantic_index[slot],
shader->input_info);
if (vs_slot < 0) {
debug_printf("VS/TCS signature mismatch!\n");
(*input_data)[i][slot][0] = 0;
(*input_data)[i][slot][1] = 0;
(*input_data)[i][slot][2] = 0;
(*input_data)[i][slot][3] = 0;
} else {
(*input_data)[i][slot][0] = input[vs_slot][0];
(*input_data)[i][slot][1] = input[vs_slot][1];
(*input_data)[i][slot][2] = input[vs_slot][2];
(*input_data)[i][slot][3] = input[vs_slot][3];
#if DEBUG_INPUTS
debug_printf("\t\t%p = %f %f %f %f\n", &(*input_data)[i][slot][0],
(*input_data)[i][slot][0],
(*input_data)[i][slot][1],
(*input_data)[i][slot][2],
(*input_data)[i][slot][3]);
#endif
++vs_slot;
}
}
}
}
#define DEBUG_OUTPUTS 0
static void
llvm_store_tcs_output(struct draw_tess_ctrl_shader *shader,
unsigned prim_id,
struct draw_vertex_info *output_verts,
unsigned vert_start)
{
float (*output_ptr)[4];
float (*output_data)[32][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS] = &shader->tcs_output->data;
unsigned slot, i;
unsigned num_vertices = shader->vertices_out;
char *output = (char *)output_verts->verts->data;
output += vert_start * output_verts->stride;
for (i = 0; i < num_vertices; i++) {
#if DEBUG_OUTPUTS
debug_printf("%d) tcs store vertex index = %d (prim idx = %d)\n",
i, prim_id, 0);
#endif
output_ptr = (float(*)[4])(output + (i * output_verts->stride));
for (slot = 0; slot < shader->info.num_outputs; ++slot) {
output_ptr[slot][0] = (*output_data)[i][slot][0];
output_ptr[slot][1] = (*output_data)[i][slot][1];
output_ptr[slot][2] = (*output_data)[i][slot][2];
output_ptr[slot][3] = (*output_data)[i][slot][3];
#if DEBUG_OUTPUTS
debug_printf("\t\t%p = %f %f %f %f\n",
&output_ptr[slot][0],
output_ptr[slot][0],
output_ptr[slot][1],
output_ptr[slot][2],
output_ptr[slot][3]);
#endif
}
}
}
static void
llvm_tcs_run(struct draw_tess_ctrl_shader *shader, uint32_t prim_id)
{
shader->current_variant->jit_func(shader->jit_context, shader->tcs_input->data, shader->tcs_output->data, prim_id,
shader->draw->pt.vertices_per_patch);
}
#endif
/**
* Execute tess ctrl shader.
*/
int draw_tess_ctrl_shader_run(struct draw_tess_ctrl_shader *shader,
const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
const struct draw_vertex_info *input_verts,
const struct draw_prim_info *input_prim,
const struct tgsi_shader_info *input_info,
struct draw_vertex_info *output_verts,
struct draw_prim_info *output_prims )
{
const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
unsigned num_outputs = draw_total_tcs_outputs(shader->draw);
unsigned input_stride = input_verts->vertex_size;
unsigned vertex_size = sizeof(struct vertex_header) + num_outputs * 4 * sizeof(float);
unsigned num_patches = input_prim->count / shader->draw->pt.vertices_per_patch;
output_verts->vertex_size = vertex_size;
output_verts->stride = output_verts->vertex_size;
output_verts->verts = NULL;
output_verts->count = 0;
shader->input = input;
shader->input_vertex_stride = input_stride;
shader->input_info = input_info;
output_prims->linear = TRUE;
output_prims->start = 0;
output_prims->elts = NULL;
output_prims->count = 0;
output_prims->prim = PIPE_PRIM_PATCHES;
output_prims->flags = 0;
output_prims->primitive_lengths = NULL;
output_prims->primitive_count = 0;
if (shader->draw->collect_statistics) {
shader->draw->statistics.hs_invocations += num_patches;
}
#ifdef DRAW_LLVM_AVAILABLE
for (unsigned i = 0; i < num_patches; i++) {
uint32_t vert_start = output_verts->count;
output_verts->count += shader->vertices_out;
llvm_fetch_tcs_input(shader, input_prim, i, shader->draw->pt.vertices_per_patch);
llvm_tcs_run(shader, i);
uint32_t old_verts = util_align_npot(vert_start, 16);
uint32_t new_verts = util_align_npot(output_verts->count, 16);
uint32_t old_size = output_verts->vertex_size * old_verts;
uint32_t new_size = output_verts->vertex_size * new_verts;
output_verts->verts = REALLOC(output_verts->verts, old_size, new_size);
llvm_store_tcs_output(shader, i, output_verts, vert_start);
}
#endif
output_prims->primitive_count = num_patches;
return 0;
}
#ifdef DRAW_LLVM_AVAILABLE
#define DEBUG_INPUTS 0
static void
llvm_fetch_tes_input(struct draw_tess_eval_shader *shader,
const struct draw_prim_info *input_prim_info,
unsigned prim_id,
unsigned num_vertices)
{
const float (*input_ptr)[4];
float (*input_data)[32][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS] = &shader->tes_input->data;
unsigned slot, i;
int vs_slot;
unsigned input_vertex_stride = shader->input_vertex_stride;
input_ptr = shader->input;
for (i = 0; i < num_vertices; i++) {
const float (*input)[4];
int vertex_idx = prim_id * num_vertices + i;
if (input_prim_info->linear == FALSE)
vertex_idx = input_prim_info->elts[vertex_idx];
#if DEBUG_INPUTS
debug_printf("%d) tes vertex index = %d (prim idx = %d)\n",
i, prim_id, 0);
#endif
input = (const float (*)[4])((const char *)input_ptr + (vertex_idx * input_vertex_stride));
for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
vs_slot = draw_tes_get_input_index(
shader->info.input_semantic_name[slot],
shader->info.input_semantic_index[slot],
shader->input_info);
if (vs_slot < 0) {
debug_printf("TCS/TES signature mismatch!\n");
(*input_data)[i][slot][0] = 0;
(*input_data)[i][slot][1] = 0;
(*input_data)[i][slot][2] = 0;
(*input_data)[i][slot][3] = 0;
} else {
(*input_data)[i][slot][0] = input[vs_slot][0];
(*input_data)[i][slot][1] = input[vs_slot][1];
(*input_data)[i][slot][2] = input[vs_slot][2];
(*input_data)[i][slot][3] = input[vs_slot][3];
#if DEBUG_INPUTS
debug_printf("\t\t%p = %f %f %f %f\n",
&input[vs_slot][0],
(*input_data)[i][slot][0],
(*input_data)[i][slot][1],
(*input_data)[i][slot][2],
(*input_data)[i][slot][3]);
#endif
++vs_slot;
}
}
}
}
static void
llvm_fetch_tess_factors(struct draw_tess_eval_shader *shader,
unsigned patch_id,
unsigned num_vertices,
struct pipe_tessellation_factors *factors)
{
int outer_slot = draw_tes_get_input_index(
TGSI_SEMANTIC_TESSOUTER, 0, shader->input_info);
int inner_slot = draw_tes_get_input_index(
TGSI_SEMANTIC_TESSINNER, 0, shader->input_info);
const float (*input_ptr)[4];
const float (*input)[4];
input_ptr = shader->input;
input = (const float (*)[4])((const char *)input_ptr + ((patch_id * num_vertices) * shader->input_vertex_stride));
if (outer_slot != -1) {
for (unsigned i = 0; i < 4; i++)
factors->outer_tf[i] = input[outer_slot][i];
} else {
for (unsigned i = 0; i < 4; i++)
factors->outer_tf[i] = shader->draw->default_outer_tess_level[i];
}
if (inner_slot != -1) {
for (unsigned i = 0; i < 2; i++)
factors->inner_tf[i] = input[inner_slot][i];
} else {
for (unsigned i = 0; i < 2; i++)
factors->inner_tf[i] = shader->draw->default_inner_tess_level[i];
}
}
static void
llvm_tes_run(struct draw_tess_eval_shader *shader,
uint32_t prim_id,
uint32_t patch_vertices_in,
struct pipe_tessellator_data *tess_data,
struct pipe_tessellation_factors *tess_factors,
struct vertex_header *output)
{
shader->current_variant->jit_func(shader->jit_context, shader->tes_input->data, output, prim_id,
tess_data->num_domain_points, tess_data->domain_points_u, tess_data->domain_points_v,
tess_factors->outer_tf, tess_factors->inner_tf, patch_vertices_in);
}
#endif
/**
* Execute tess eval shader.
*/
int draw_tess_eval_shader_run(struct draw_tess_eval_shader *shader,
const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
unsigned num_input_vertices_per_patch,
const struct draw_vertex_info *input_verts,
const struct draw_prim_info *input_prim,
const struct tgsi_shader_info *input_info,
struct draw_vertex_info *output_verts,
struct draw_prim_info *output_prims,
ushort **elts_out)
{
const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
unsigned num_outputs = draw_total_tes_outputs(shader->draw);
unsigned input_stride = input_verts->vertex_size;
unsigned vertex_size = sizeof(struct vertex_header) + num_outputs * 4 * sizeof(float);
ushort *elts = NULL;
output_verts->vertex_size = vertex_size;
output_verts->stride = output_verts->vertex_size;
output_verts->count = 0;
output_verts->verts = NULL;
output_prims->linear = FALSE;
output_prims->start = 0;
output_prims->elts = NULL;
output_prims->count = 0;
output_prims->prim = get_tes_output_prim(shader);
output_prims->flags = 0;
output_prims->primitive_lengths = NULL;
output_prims->primitive_count = 0;
shader->input = input;
shader->input_vertex_stride = input_stride;
shader->input_info = input_info;
#ifdef DRAW_LLVM_AVAILABLE
struct pipe_tessellation_factors factors;
struct pipe_tessellator_data data = { 0 };
struct pipe_tessellator *ptess = p_tess_init(shader->prim_mode,
shader->spacing,
!shader->vertex_order_cw,
shader->point_mode);
for (unsigned i = 0; i < input_prim->primitive_count; i++) {
uint32_t vert_start = output_verts->count;
uint32_t prim_start = output_prims->primitive_count;
uint32_t elt_start = output_prims->count;
llvm_fetch_tess_factors(shader, i, num_input_vertices_per_patch, &factors);
/* tessellate with the factors for this primitive */
p_tessellate(ptess, &factors, &data);
if (data.num_domain_points == 0)
continue;
uint32_t old_verts = vert_start;
uint32_t new_verts = vert_start + util_align_npot(data.num_domain_points, 4);
uint32_t old_size = output_verts->vertex_size * old_verts;
uint32_t new_size = output_verts->vertex_size * new_verts;
output_verts->verts = REALLOC(output_verts->verts, old_size, new_size);
output_verts->count += data.num_domain_points;
output_prims->count += data.num_indices;
elts = REALLOC(elts, elt_start * sizeof(uint16_t),
output_prims->count * sizeof(uint16_t));
for (unsigned i = 0; i < data.num_indices; i++)
elts[elt_start + i] = vert_start + data.indices[i];
llvm_fetch_tes_input(shader, input_prim, i, num_input_vertices_per_patch);
/* run once per primitive? */
char *output = (char *)output_verts->verts;
output += vert_start * vertex_size;
llvm_tes_run(shader, i, num_input_vertices_per_patch, &data, &factors, (struct vertex_header *)output);
if (shader->draw->collect_statistics) {
shader->draw->statistics.ds_invocations += data.num_domain_points;
}
uint32_t prim_len = u_prim_vertex_count(output_prims->prim)->min;
output_prims->primitive_count += data.num_indices / prim_len;
output_prims->primitive_lengths = REALLOC(output_prims->primitive_lengths, prim_start * sizeof(uint32_t),
output_prims->primitive_count * sizeof(uint32_t));
for (unsigned i = prim_start; i < output_prims->primitive_count; i++) {
output_prims->primitive_lengths[i] = prim_len;
}
}
p_tess_destroy(ptess);
#endif
*elts_out = elts;
output_prims->elts = elts;
return 0;
}
struct draw_tess_ctrl_shader *
draw_create_tess_ctrl_shader(struct draw_context *draw,
const struct pipe_shader_state *state)
{
#ifdef DRAW_LLVM_AVAILABLE
boolean use_llvm = draw->llvm != NULL;
struct llvm_tess_ctrl_shader *llvm_tcs = NULL;
#endif
struct draw_tess_ctrl_shader *tcs;
#ifdef DRAW_LLVM_AVAILABLE
if (use_llvm) {
llvm_tcs = CALLOC_STRUCT(llvm_tess_ctrl_shader);
if (!llvm_tcs)
return NULL;
tcs = &llvm_tcs->base;
make_empty_list(&llvm_tcs->variants);
} else
#endif
{
tcs = CALLOC_STRUCT(draw_tess_ctrl_shader);
}
if (!tcs)
return NULL;
tcs->draw = draw;
tcs->state = *state;
nir_tgsi_scan_shader(state->ir.nir, &tcs->info, true);
tcs->vector_length = 4;
tcs->vertices_out = tcs->info.properties[TGSI_PROPERTY_TCS_VERTICES_OUT];
#ifdef DRAW_LLVM_AVAILABLE
if (use_llvm) {
tcs->tcs_input = align_malloc(sizeof(struct draw_tcs_inputs), 16);
memset(tcs->tcs_input, 0, sizeof(struct draw_tcs_inputs));
tcs->tcs_output = align_malloc(sizeof(struct draw_tcs_outputs), 16);
memset(tcs->tcs_output, 0, sizeof(struct draw_tcs_outputs));
tcs->jit_context = &draw->llvm->tcs_jit_context;
llvm_tcs->variant_key_size =
draw_tcs_llvm_variant_key_size(
MAX2(tcs->info.file_max[TGSI_FILE_SAMPLER]+1,
tcs->info.file_max[TGSI_FILE_SAMPLER_VIEW]+1),
tcs->info.file_max[TGSI_FILE_IMAGE]+1);
}
#endif
return tcs;
}
void draw_bind_tess_ctrl_shader(struct draw_context *draw,
struct draw_tess_ctrl_shader *dtcs)
{
draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
if (dtcs) {
draw->tcs.tess_ctrl_shader = dtcs;
} else {
draw->tcs.tess_ctrl_shader = NULL;
}
}
void draw_delete_tess_ctrl_shader(struct draw_context *draw,
struct draw_tess_ctrl_shader *dtcs)
{
if (!dtcs)
return;
#ifdef DRAW_LLVM_AVAILABLE
if (draw->llvm) {
struct llvm_tess_ctrl_shader *shader = llvm_tess_ctrl_shader(dtcs);
struct draw_tcs_llvm_variant_list_item *li;
li = first_elem(&shader->variants);
while(!at_end(&shader->variants, li)) {
struct draw_tcs_llvm_variant_list_item *next = next_elem(li);
draw_tcs_llvm_destroy_variant(li->base);
li = next;
}
assert(shader->variants_cached == 0);
align_free(dtcs->tcs_input);
align_free(dtcs->tcs_output);
}
#endif
if (dtcs->state.ir.nir)
ralloc_free(dtcs->state.ir.nir);
FREE(dtcs);
}
#ifdef DRAW_LLVM_AVAILABLE
void draw_tcs_set_current_variant(struct draw_tess_ctrl_shader *shader,
struct draw_tcs_llvm_variant *variant)
{
shader->current_variant = variant;
}
#endif
struct draw_tess_eval_shader *
draw_create_tess_eval_shader(struct draw_context *draw,
const struct pipe_shader_state *state)
{
#ifdef DRAW_LLVM_AVAILABLE
boolean use_llvm = draw->llvm != NULL;
struct llvm_tess_eval_shader *llvm_tes = NULL;
#endif
struct draw_tess_eval_shader *tes;
#ifdef DRAW_LLVM_AVAILABLE
if (use_llvm) {
llvm_tes = CALLOC_STRUCT(llvm_tess_eval_shader);
if (!llvm_tes)
return NULL;
tes = &llvm_tes->base;
make_empty_list(&llvm_tes->variants);
} else
#endif
{
tes = CALLOC_STRUCT(draw_tess_eval_shader);
}
if (!tes)
return NULL;
tes->draw = draw;
tes->state = *state;
nir_tgsi_scan_shader(state->ir.nir, &tes->info, true);
tes->prim_mode = tes->info.properties[TGSI_PROPERTY_TES_PRIM_MODE];
tes->spacing = tes->info.properties[TGSI_PROPERTY_TES_SPACING];
tes->vertex_order_cw = tes->info.properties[TGSI_PROPERTY_TES_VERTEX_ORDER_CW];
tes->point_mode = tes->info.properties[TGSI_PROPERTY_TES_POINT_MODE];
tes->vector_length = 4;
tes->position_output = -1;
for (unsigned i = 0; i < tes->info.num_outputs; i++) {
if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
tes->info.output_semantic_index[i] == 0)
tes->position_output = i;
if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX)
tes->viewport_index_output = i;
if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
debug_assert(tes->info.output_semantic_index[i] <
PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
tes->ccdistance_output[tes->info.output_semantic_index[i]] = i;
}
}
#ifdef DRAW_LLVM_AVAILABLE
if (use_llvm) {
tes->tes_input = align_malloc(sizeof(struct draw_tes_inputs), 16);
memset(tes->tes_input, 0, sizeof(struct draw_tes_inputs));
tes->jit_context = &draw->llvm->tes_jit_context;
llvm_tes->variant_key_size =
draw_tes_llvm_variant_key_size(
MAX2(tes->info.file_max[TGSI_FILE_SAMPLER]+1,
tes->info.file_max[TGSI_FILE_SAMPLER_VIEW]+1),
tes->info.file_max[TGSI_FILE_IMAGE]+1);
}
#endif
return tes;
}
void draw_bind_tess_eval_shader(struct draw_context *draw,
struct draw_tess_eval_shader *dtes)
{
draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
if (dtes) {
draw->tes.tess_eval_shader = dtes;
draw->tes.position_output = dtes->position_output;
} else {
draw->tes.tess_eval_shader = NULL;
}
}
void draw_delete_tess_eval_shader(struct draw_context *draw,
struct draw_tess_eval_shader *dtes)
{
if (!dtes)
return;
#ifdef DRAW_LLVM_AVAILABLE
if (draw->llvm) {
struct llvm_tess_eval_shader *shader = llvm_tess_eval_shader(dtes);
struct draw_tes_llvm_variant_list_item *li;
li = first_elem(&shader->variants);
while(!at_end(&shader->variants, li)) {
struct draw_tes_llvm_variant_list_item *next = next_elem(li);
draw_tes_llvm_destroy_variant(li->base);
li = next;
}
assert(shader->variants_cached == 0);
align_free(dtes->tes_input);
}
#endif
if (dtes->state.ir.nir)
ralloc_free(dtes->state.ir.nir);
FREE(dtes);
}
#ifdef DRAW_LLVM_AVAILABLE
void draw_tes_set_current_variant(struct draw_tess_eval_shader *shader,
struct draw_tes_llvm_variant *variant)
{
shader->current_variant = variant;
}
#endif
enum pipe_prim_type get_tes_output_prim(struct draw_tess_eval_shader *shader)
{
if (shader->point_mode)
return PIPE_PRIM_POINTS;
else if (shader->prim_mode == PIPE_PRIM_LINES)
return PIPE_PRIM_LINES;
else
return PIPE_PRIM_TRIANGLES;
}
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